Question

Determine modulation index of an FM carrier having a frequency deviation of 25 kHz and modulating signal of 5kHz. Also determine carrier swing.

Answer 1

Δf = 25 kH_z, f_m = 5kH
m = \(\frac{\Delta f}{f_m}=\frac{25}{5}=5\)
Carrier swing, C_s = 2.Δf
= 2 x 25kH_z
= 50 kHz